/* DefaultTreeCellRenderer.java 
 Copyright (C) 2002, 2004, 2006, Free Software Foundation, Inc.
 
 This file is part of GNU Classpath.

 GNU Classpath is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GNU Classpath is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GNU Classpath; see the file COPYING.  If not, write to the
 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. */

package com.seeqool.v1;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Rectangle;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTree;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.plaf.UIResource;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;

public class DatabaseTreeCellRenderer extends JLabel implements TreeCellRenderer {
  private static final long serialVersionUID = 1L;
	
  protected boolean selected;
  protected boolean hasFocus;
  private boolean drawsFocusBorderAroundIcon;
  protected transient Icon[] icons;
  protected Color textSelectionColor;
  protected Color textNonSelectionColor;
  protected Color backgroundSelectionColor;
  protected Color backgroundNonSelectionColor;
  protected Color borderSelectionColor;

  /**
   * Creates a new tree cell renderer with defaults appropriate for the 
   * current {@link LookAndFeel}.
   */
  public DatabaseTreeCellRenderer(Icon[] treeIcons) {
	icons = new Icon[treeIcons.length];
	for (int a=0; a<treeIcons.length; a++)
		icons[a] = treeIcons[a];

    setTextNonSelectionColor(UIManager.getColor("Tree.textForeground"));
    setTextSelectionColor(UIManager.getColor("Tree.selectionForeground"));
    setBackgroundNonSelectionColor(UIManager.getColor("Tree.textBackground"));
    setBackgroundSelectionColor(UIManager.getColor("Tree.selectionBackground"));
    setBorderSelectionColor(UIManager.getColor("Tree.selectionBorderColor"));
    Object val = UIManager.get("Tree.drawsFocusBorderAroundIcon");
    drawsFocusBorderAroundIcon = val != null && ((Boolean) val).booleanValue();
  }


  /**
   * Sets the text color for tree cells that are selected.
   * 
   * @param c  the color (<code>null</code> permitted).
   * 
   * @see #getTextSelectionColor()
   */
  public void setTextSelectionColor(Color c)
  {
    textSelectionColor = c;
  }

  /**
   * Returns the text color for tree cells that are selected.
   * The default value is obtained from the {@link LookAndFeel} defaults
   * table using the key <code>Tree.selectionForeground</code>.
   * 
   * @return The text color for tree cells that are selected.
   * 
   * @see #setTextSelectionColor(Color)
   */
  public Color getTextSelectionColor()
  {
    return textSelectionColor;
  }

  /**
   * Sets the text color for tree cells that are not selected.
   * 
   * @param c  the color (<code>null</code> permitted).
   * 
   * @see #getTextNonSelectionColor()
   */
  public void setTextNonSelectionColor(Color c)
  {
    textNonSelectionColor = c;
  }

  /**
   * Returns the text color for tree cells that are not selected.
   * The default value is obtained from the {@link LookAndFeel} defaults
   * table using the key <code>Tree.selectionForeground</code>.
   * 
   * @return The background color for tree cells that are not selected.
   * 
   * @see #setTextgroundNonSelectionColor(Color)
   */
  public Color getTextNonSelectionColor()
  {
    return textNonSelectionColor;
  }

  /**
   * Sets the background color for tree cells that are selected.
   * 
   * @param c  the color (<code>null</code> permitted).
   * 
   * @see #getBackgroundSelectionColor()
   */
  public void setBackgroundSelectionColor(Color c)
  {
    backgroundSelectionColor = c;
  }

  /**
   * Returns the background color for tree cells that are selected.
   * The default value is obtained from the {@link LookAndFeel} defaults
   * table using the key <code>Tree.selectionBackground</code>.
   * 
   * @return The background color for tree cells that are selected.
   * 
   * @see #setBackgroundSelectionColor(Color)
   */
  public Color getBackgroundSelectionColor()
  {
    return backgroundSelectionColor;
  }

  /**
   * Sets the background color for tree cells that are not selected.
   * 
   * @param c  the color (<code>null</code> permitted).
   * 
   * @see #getBackgroundNonSelectionColor()
   */
  public void setBackgroundNonSelectionColor(Color c)
  {
    backgroundNonSelectionColor = c;
  }

  /**
   * Returns the background color for tree cells that are not selected.
   * The default value is obtained from the {@link LookAndFeel} defaults
   * table using the key <code>Tree.textBackground</code>.
   * 
   * @return The background color for tree cells that are not selected.
   * 
   * @see #setBackgroundNonSelectionColor(Color)
   */
  public Color getBackgroundNonSelectionColor()
  {
    return backgroundNonSelectionColor;
  }

  /**
   * Sets the border color for tree cells that are selected.
   * 
   * @param c  the color (<code>null</code> permitted).
   * 
   * @see #getBorderSelectionColor()
   */
  public void setBorderSelectionColor(Color c)
  {
    borderSelectionColor = c;
  }

  /**
   * Returns the border color for tree cells that are selected.
   * The default value is obtained from the {@link LookAndFeel} defaults
   * table using the key <code>Tree.selectionBorderColor</code>.
   * 
   * @return The border color for tree cells that are selected.
   * 
   * @see #setBorderSelectionColor(Color)
   */
  public Color getBorderSelectionColor()
  {
    return borderSelectionColor;
  }

  /**
   * Sets the font.
   * 
   * @param f the font.
   * 
   * @see #getFont()
   */
  public void setFont(Font f)
  {
    if (f != null && f instanceof UIResource)
      f = null;
    super.setFont(f);
  }

  /**
   * Sets the background color.
   * 
   * @param c the color.
   */
  public void setBackground(Color c)
  {
    if (c != null && c instanceof UIResource)
      c = null;
    super.setBackground(c);
  }

  /**
   * Returns a component (in fact <code>this</code>) that can be used to
   * render a tree cell with the specified state.
   * 
   * @param tree  the tree that the cell belongs to.
   * @param val  the cell value.
   * @param selected  indicates whether or not the cell is selected.
   * @param expanded  indicates whether or not the cell is expanded.
   * @param leaf  indicates whether or not the cell is a leaf in the tree.
   * @param row  the row index.
   * @param hasFocus  indicates whether or not the cell has the focus.
   * 
   * @return <code>this</code>.
   */
  public Component getTreeCellRendererComponent(JTree tree, Object val,
                                                boolean selected,
                                                boolean expanded, boolean leaf,
                                                int row, boolean hasFocus)
  {
	  TreePath path = tree.getPathForRow(row);
	  if (path!=null) {
		  setIcon(icons[path.getPathCount()-1]);
	  }

    setText(val.toString());
    this.selected = selected;
    this.hasFocus = hasFocus;
    setHorizontalAlignment(LEFT);
    setOpaque(false);
    setVerticalAlignment(CENTER);
    setEnabled(true);
    super.setFont(UIManager.getFont("Tree.font"));

    if (selected)
      {
        super.setBackground(getBackgroundSelectionColor());
        setForeground(getTextSelectionColor());
        
        if (hasFocus)
          setBorderSelectionColor(UIManager.getLookAndFeelDefaults().
                                  getColor("Tree.selectionBorderColor"));
        else
          setBorderSelectionColor(null);
      }
    else
      {
        super.setBackground(getBackgroundNonSelectionColor());
        setForeground(getTextNonSelectionColor());
        setBorderSelectionColor(null);
      }

    return this;
  }

  /**
   * Returns the current font.
   * 
   * @return The current font.
   * 
   * @see #setFont(Font)
   */
  public Font getFont()
  {
    return super.getFont();
  }

  /**
   * Paints the value. The background is filled based on selected.
   * 
   * @param g the graphics device.
   */
  public void paint(Graphics g)
  {
    // Determine background color.
    Color bgColor;
    if (selected)
      bgColor = getBackgroundSelectionColor();
    else
      {
        bgColor = getBackgroundNonSelectionColor();
    if (bgColor == null)
          bgColor = getBackground();
      }
    // Paint background.
    int xOffset = -1;
    if (bgColor != null)
      {
        xOffset = getXOffset();
        g.setColor(bgColor);
        g.fillRect(xOffset, 0, getWidth() - xOffset, getHeight());
      }

    if (hasFocus) {
      if (drawsFocusBorderAroundIcon)
        xOffset = 0;
      else if (xOffset == -1)
        xOffset = getXOffset();
      paintFocus(g, xOffset, 0, getWidth() - xOffset, getHeight());
    }
    super.paint(g);
  }

  /**
   * Paints the focus indicator.
   */
  private void paintFocus(Graphics g, int x, int y, int w, int h)
  {
    Color col = getBorderSelectionColor();
    if (col != null)
      {
        g.setColor(col);
    g.drawRect(x, y, w - 1, h - 1);
      }
  }

  /**
   * Determines the X offset of the label that is caused by
   * the icon.
   *
   * @return the X offset of the label
   */
  private int getXOffset()
  {
    Icon i = getIcon();
    int offs = 0;
    if (i != null && getText() != null)
      offs = i.getIconWidth() + Math.max(0, getIconTextGap() - 1);
    return offs;
  }

  /**
   * Returns the preferred size of the cell.
   * 
   * @return The preferred size of the cell.
   */
  public Dimension getPreferredSize()
  {
    Dimension size = super.getPreferredSize();
    size.width += 3;
    return size;
  } 

  // Following functions overridden to do nothing for performance reasons
  public void validate() {} 
  public void revalidate() {} 
  public void repaint(long tm, int x, int y, int width, int height) {} 
  public void repaint(Rectangle area) {} 
  protected void firePropertyChange(String name, Object  oldValue, Object  newValue) {}
  public    void firePropertyChange(String name, byte    oldValue, byte    newValue) {}
  public    void firePropertyChange(String name, char    oldValue, char    newValue) {}
  public    void firePropertyChange(String name, short   oldValue, short   newValue) {} 
  public    void firePropertyChange(String name, int     oldValue, int     newValue) {}
  public    void firePropertyChange(String name, long    oldValue, long    newValue) {}
  public    void firePropertyChange(String name, float   oldValue, float   newValue) {}
  public    void firePropertyChange(String name, double  oldValue, double  newValue) {}
  public    void firePropertyChange(String name, boolean oldValue, boolean newValue) {} 

} 
